LIVINGSTON -- A grand jury in 21st Judicial District court formally indicted Dakota Theriot on three counts of first-degree murder today.
Theriot, 21, is accused of killing Billy Ernest, 43; daughter, Summer Ernest, 20; and son, Tanner Ernest, 17, in a mobile home along Courtney Road near Walker on the morning of Jan. 26.
Theriot used the truck belonged to Billy Ernest for the drive to Gonzales where he allegedly shot and killed his parents, Keith and Elizabeth Theriot, both 50.
He was booked in Ascension Parish on two counts of first-degree murder upon his return to Louisiana on Feb. 1. He was denied bond on his counts of first-degreed murder, and then shipped to Livingston Parish for detention.
Theriot waived extradition from Richmond County, Va., where he drove after the shooting of his parents, according to authorities.
The indictment hearing lasted approximately one hour.
21st Judicial District Attorney Scott M. Perrilloux said he has not yet decided whether he will seek the death penalty, due to uncertainty about Theriot's mental health.
"We're still getting the information together before we decide on the death penalty," he said.
Perrilloux said he has spoken to the family of the victims by phone, but has not yet met with them in person to discuss the case.
Arraignment for Theriot could come as soon as Wednesday, Feb. 13, he said.